active

busy and full of energy, and taking part in many things

In action; actually proceeding; working; in force

Emitting hot materials, such as lava, smoke, or steam, or producing tremors.

Eligible to be processed by a compiler or interpreter.

Brisk; lively.

Quick in physical movement; of an agile and vigorous body; nimble.

Having the power or quality of acting; causing change; communicating action or motion; acting;—opposed to passive, that receives.

Implying or producing rapid action.

Not passive.

Applied to a form of the verb; — opposed to passive. See active voice.

Requiring or implying action or exertion

Given to action rather than contemplation; practical; operative

Applied to all verbs that express action as distinct from mere existence or state.

Applied to verbs which assert that the subject acts upon or affects something else; transitive.

(slang) enjoying a role in anal sex in which he penetrates, rather than being penetrated by his partner.

A person or thing that is acting or capable of acting.

Any component that is not passive. See Passivity (engineering).